Tip & How-To about Motorcycles

Make your HOnda Wave/C70/C90/C100 Faster!!

A great and simple way to improve the performance it to super size the barrel and get a big piston.

These bikes will take a bore that can accomodate the Wave 125, CBR 150, Kawasaki 150 pistons. For a 110 wave you can simply over bore the barrel at a machine shop if you give them the piston and they can measure it.

This is a cheap and effective mod. I suggest you also upgrade to a Honda Dash Carb. its better suited to the new swept volume. Removing baffels from the Exhaust will help too.

These are the simplest mods for more power!

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1 Answer

does all 2 stroke barrels need sleeves for bigger piston

yes , resleeving is required for overstock size pistons.
sometimes you can bore the sleeve 1 - 2 time before resleeving is required.
when you go to order your pistons, the product description will tell you if resleeving is required.
Hope this helps you out.
Best Regards
Big Al

Aug 02, 2012 | 2011 Super Motor 50

1 Answer

My pw80 has a ceased motor. I took the head off and there is a lot of surface rust. How do I +go about sorting this outis it possible to get a rebuild kit or is it a write off??

Ebay has piston , ring and gasket kits for about $30. The barrel is cast iron, so if there is no lip a simple hone may do.
I f the barrel is pitted , you will need an oversize piston kit, and a machine shop to bore the barrel to a bigger size.

Jul 13, 2011 | Yamaha Apache RTR 180 Motorcycles

2 Answers

.i have 1987 kmx 125 it runs fine but im sure it

If the rattle is coming from the barrel / head area then it may well be a worn piston, worn or damaged bore / rings.
The best way to investigate is to remove the exhaust, get under the bike & shine a torch up into the barrel
Both barrel & piston can be inspected by removing the spark plug & slowly actuating the kick-starter

Ride safe
Please mark this as very helpful (if it has been!!)

Apr 27, 2010 | 2000 kawasaki KMX 125

1 Answer

my spelnder engine got seized,what do i do now?

You need either a replacement barrel & piston or an oversize piston & have the barrel bored to fit.
If it is a 'Nickoseal' (plated) barrel, having it bored & replated works out very expensive.
Make sure that no metal particles have found their way down into the crank area, if so the crankcases will have to be split to clean it out. (You can rinse the assembled bottom end with petrol a number of times until clean & hope its all been removed)

Good Luck
Hope this helps.
(If it does then please mark this as 'useful')
Ride Safe

Jan 29, 2010 | 2006 Hero Honda Super Splendor

1 Answer

can the ec 300 2001 model be honed or rebored and honed?

Most late modle MX & enduro (from about 1990 on plus some even earlier)
have what is called an electrofusion bore.
This is a very thin plating on the alloy cylinder. They use this so as to allow heat to dissipate quicker & can run tighter piston cylinder tolerances for improved performance.
To answer your questions,
No, they can't be re-bored(like the older style steel sleeved bore bikes could)
Yes, they can be honed but it requires a special type of hone(finger type bottle brush style hone).
Pistons are available increasing in size by much smaller incriments than the old style & are usually marked A,B,C,D(as the coating is much thinner than steel sleeve).
If it is scored very badly & you can see alluminum spots/scores anywhere on the cylinder surface there are several ways to deal with this.
Here in Australia there is a company(electrocill) that can re-cote the cylinder which is much cheaper(plus thicker & stronger) than replacing the barrel
If you have a cylinder re-coated It has to have all studs, seals & power valve assemblys removed.
You would also need to supply(or have them supply) a new piston in order for them to set the correct clearance.
Also here in Australia you can have most of the common models fitted with a sleeve & this gives you the abillity to rebore in the future.
In the U.S this company is known as Wisco(serco in Aust.)
It is worthy of noting that the piston rings are not interchangable between an electrofusion & steel type cylinder.(so if you opt for a re-sleeveing any spare rings from your spares kit ar of no use).
If you need a lead on how & if these services are available in your country(if your not in Australia) I suggest taking a look in the classified section of your local dirt bike magazine.
The trick is to undertake regular srevicing of your air filter(this is A MUST),oiling it properly with propper foam filter oil, useing a top quality 2stroke oil(motul,syn-lube for eg)
& regularly inspect & replace rings/piston as needed to get the best life from electrofusion or steel type bores
Hope this explains it all for you
Regards Andrew Porrelli

Dec 06, 2009 | 2002 Gas Gas EC 300

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